Disease suppressive soil often results from:
A) fumigation with a volatile chemical.
B) heating the soil by natural solarization or steam heat.
C) adding organic materials to the soil that stimulate diverse microorganisms.
D) repeated tillage to keep the soil bare for at least one full year.
E) all of the above
C
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Bronze is an alloy of copper, zinc, and tin with small amounts of other elements. If the percent composition is 56% copper, 1% zinc, and 42% tin, what is the ratio of copper to tin?
A. 4/3 B. 3/2 C. 2/1 D. 3/1
Fill in the blank(s) with the appropriate word(s).
When testing an EGR (Exhaust Gas Recirculation) system for proper operation using a vacuum gauge, how much should the manifold vacuum drop in inches of Mercury (Hg), when the EGR is commanded on by a scan tool?
A) 1-2 B) 8-10 C) 3-5 D) 6-8
Higher-tolerance part means that there is greater variation in the dimensions among several examples of the same part.
Answer the following statement true (T) or false (F)